The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 25, 2011
Filed:
Jun. 06, 2006
Applicant:
Takumi Yamade, Kyoto, JP;
Inventor:
Takumi Yamade, Kyoto, JP;
Assignee:
Rohm Co., Ltd., Kyoto, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B41J 2/335 (2006.01);
U.S. Cl.
CPC ...
Abstract
A thermal printhead A includes a glaze layerformed on an insulating substrate, a resistor layerformed on the glaze layer, a conductor layerformed so that part of the resistor layer is exposed to serve as a heating portionand a protective filmformed to cover the conductor layerand the heating portion. The protective filmincludes a lower first protective layer, and an upper second protective layeroverlapping the first protective layerand serving as the outermost layer. The first protective layerhas a hardness of 500 to 800 Hk and a thickness of 1 to 2 μm. The second protective layerhas a hardness of 1000 to 2000 Hk and a thickness of 5 to 8 μm.